Three of us are planning to visit Yosemite next August and we're hoping to be able to camp in the one of the three campgrounds in the Valley for at least 2 nights. I understand that starting on the 15th of each month you can (attempt) to reserve a site up to 5 months in advance. Was on the website Yosemitesites - November 15 - and saw that all three valley campgrounds were already fully bookby slw - General Discussion